Thomas walter barber



(No Model.)

T. W. BARBER.

ELEVATOR.

N0.534,945. Patented Feb. 26, 1.895.

mm "will" Witnesses: Inventorvings or blocks M and N".

NiTnD STATES THOMAS WALTER BARBER, OFST. LEONARDS, ENGLAND.

ELEVATOR.

SPECIFICATION forming part of Letters Patent N o. 534,945, datedFebruary 26, 1895.

Application led May 8. 1893. Renewed February 6, 1895. Serial No.537,430. (No model.)

To all whom t may concern:

Be it known that I, THOMAS WALTER BAR- BER, a citizen of Great Britain,residing at Ellora, Silverhill, St. Leonards-on-Sea, in the county ofSussex, England, have invented new and useful Improvements inSelf-Sustaining Lifts and Elevators, of which the following is aspecification.

My invention relates to hand hoisting apparatus and is designed moreparticularly to provide an improved brake mechanism, whereby the brakeis automatically thrown ont of engagement when the hoisting rope ispulled so as to allow the hoisting mechanism to be operated, and setwhen the rope is released.

The invention consists in the novel construction and combination ofparts hereinafter fully described and claimed.

In the accompanying drawings, Figure l is a perspective View of ahoisting apparatus constructed in accordance with my invention. Fig. 2isa detail vertical longitudinal section. Fig. 3 is a side elevation.

In the said drawings the reference letters L, L, designate two beamsupon which the hoisting mechanism is supported. Secured to these beamsare two bearing or journal boxes M and N, in which are located bear- Oneof these bearings M', is pivoted in its box by means of pivot P, so thatit can oscillate or tilt therein. The opposite bearing N is formed withan elongated slot N2 through which passes a pin N3. The letter Odesignates the hoisting shaft passing through said bearings and providedat one end with a weight S, and at its other end with a grooved hoistingwheel T around which passes the hoistingA rope U. Intermediate the endsof said shaft is a pinion `X which meshes with a cog wheel F on a loadshaft E. This shaft is journaled in arms H, one end of each of which ispivoted to a lug J, secured to the beams L. At their free ends thesearms are connected by means of a shaft W, provided with a friction wheelQ, which bears against a wheel or enlarged circular portion O', of shaftO.

Secured to extensions of the lugs J, of the beams L, is a segment R,which is adapted to engage with a wheel G, secured to the shaft E. ThisWheel if desired may be formed integral with cog wheel F.

The operation is as follows: When it is desired to elevate the ropesecured to the load shaft, the hoisting rope U is pulled which willslightly raise the opposite end of the Shaft O, which in turn will raisethe arms H and throw the wheel G out of engagement with the brakesegment and allow the load shaft and cog wheel E to be rotated throughthe medium of the pinion X. When the hoisting rope is released the shaftO will return to normal by reason of weight S andthe hoisting mechanismbe checked by the wheel G engaging with the segment R. It will thus beseen that the brake will be released as the Yhoisting rope is actuatedto rotate the hoisting shaft and set when said ropeis released. Havingthus described my invention, what I claim is- 1. In a hand hoistingmachine, the combination with the load shaft, having a friction wheel ordrum and a cog wheel, and the pivoted arms in which said shaft isjournaled, of the tilting hoisting shaft, having a pinion meshing withsaid cog Wheel, the brake segment, the wheel resting; on said shaft, anda shaft on which said wheel is journaled, said latter shaft beingjournaled in the free ends of said pivoted arms.

2. In a brake mechanism for hoisting apparatus, the combination with thetilting hoisting shaft and its wheel, and the pinion and weight carriedby said shaft, of' the pivoted arms having a friction wheel adapted toengage with said shaft, the load shaft jourlnaled in said arms, providedwith a cog wheel and a friction drum and the brake segment with whichsaid drum engages substantially as described.

THOMAS WALTER BARBER. Witnesses:

ARCHIBALD E. YOUNG, RoBT. HUGHES.

